{
  "name": "x402-fxrates",
  "description": "FX rates (daily reference — not real-time). $0.004 per call. Send {\"pair\":\"USDVND\"}.",
  "url": "https://api.mekongtradeintel.com/fxrates/api/fx",
  "method": "POST",
  "price": "$0.001",
  "network": "eip155:8453",
  "payTo": "0x198f3895551B309fF5C5F59e690FB0823d10EA93",
  "protocol": "x402 v2 (exact scheme, USDC on Base)",
  "howToPay": "Send the request without payment; you get HTTP 402 with payment instructions. Sign with your wallet and retry with the X-PAYMENT header.",
  "spec": "https://api.mekongtradeintel.com/fxrates/.well-known/x402",
  "docs": "https://api.mekongtradeintel.com/tools/",
  "inputFields": "see /openapi.json"
}